<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <form enctype="multipart/form-data" action="http://www.ds.com/index2.php" method="post">
    <table width="90%" id="general-table" class="tab_table" align="center">
        <tr>
            <td class="label">所在品牌：</td>
            <td>
                <select name="brand_id">
                    <option value="">请 选择</option>
                    <option value="1">大写一</option>
                    <option value="2">大写二</option>
                    <option value="3">大写三</option>
                </select>
            </td>
        </tr>
    </table>
        <input type="submit" value="提交"/>
    </form>
</body>
</html>

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018/7/13 0013
 * Time: 14:32
 */

var_dump($_POST);